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Use of microorganisms for copper reduction for control of late blight and downy mildew (Oomycetes) in organic farming

Project


Project code: JKI-SF-08-1240
Contract period: 01.04.2017 - 31.12.2018
Purpose of research: Applied research
Keywords: crop protection, potato, Oomycetes

The JKI will test the efficacy of new microorganism pesticides in the organic field trials in Dahnsdorf (Land Brandenburg). The field trial are certified according to EU organic-guidelines in a randomized blocks with four repetitions under field conditions. The effectiveness of two product variants are compared with an untreated control and copper (with a maximum of 3 kg of pure copper / ha).

The results 2017 showed that copper pesticides effectively protect the leaf area from phytophthora infestation by 5 to 8 days longer. Thus, additional yields were achieved (average of 3.2 t /ha) with a maximum allowable copper use of 3 kg pure copper / ha. It is also possible to halve the amount of copper from 3 kg / ha to 1.5 kg / ha in extreme years with high infection pressure. A complete substitution of copper as a pesticide is not possible. There were no significant differences in phytophthora infestation between the copper variants with and without the addition of the microorganism product. As a result of the drought in 2018, no phytophthora infestation has occurred.

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Subjects

Framework programme

BMEL - research cluster

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